Keysight Technologies N4374B, Руководство пользователя

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Specifications
Keysight
N4374B Lightwave Component Analyzer, User’s Guide 139
Specifications for optical to electrical measurements at 1550 nm
(OE mode)
N4374B system with E5071C -245 network analyzer
Specifications are valid under the stated measurement
conditions.
• For external source optical input all specifications are typical
(requires option -101, -102, after CW responsivity and user
calibration with external source, for +4dBm average output
power from LCA optical output)
• For wavelength (1550 ±20) nm
(option -101, 102)
.
System performance 10 MHz to 50 MHz 50 MHz to 0.7 GHz 0.7 GHz to 4.5 GHz
Relative
frequency
response
uncertainty
a
DUT response
¥ -36 dB(A/W)
b
±0.5 dBe typ. ±0.7 dBe
(±0.5 dBe typ.
c
)
±0.8 dBe
(±0.6 dBe typ.
c
)
¥ -46 dB(A/W) ±0.5 dBe typ. ±0.5 dBe typ. ±0.6 dBe typ.
Absolute
frequency
response
uncertainty DUT response
¥ -36 dB(A/W)
b
±1.2 dBe typ. ±2.0 dBe
(±1.2 dBe typ.
c
)
±2.1 dBe
(±1.2 dBe typ.
c
)
Frequency
response
repeatability
(typ.)
a
DUT response
¥ -46 dB(A/W)
b
±0.02 dBe ±0.02 dBe ±0.03 dBe
Minimum measurable frequency
Response (noise floor)
a d e
-83 dB (A/W) typ. -92 dB (A/W) -90 dB (A/W)
Phase
uncertainty
(typ.)
a f
DUT response
¥ -36 dB(A/W)
b
- ±1.0° ±1.0°
Group delay uncertainty Derived from phase uncertainty, see section “Group delay uncertainty ” on page 143.
Example: ±1.0°
±8 ps (0.5 GHz aperture)
a
For +4 dBm average output power from LCA optical output
b
For DUT response max. +10 dB (A/W)
c
Typical with internal source
d
IFBW = 100 Hz.
e
qverage value over frequency range
f
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a wavelength step size of ¤ 0.2 GHz to avoid phase
wraps).
Excluding a constant group delay offset of <±0.3 ns typ. (cable length uncertainty < ±0.06 m). A constant group delay offset leads to a phase offset
Dj = 360°
×
D GD
×
f
mod
.(in deg).